Iostream Problem

[Altera_Forum]

Hi, 

 I have recently been using the Nios II v6.0 tools and downloaded and installed the eCos implementation for Neos. I went through the documentation for creating the eCos library and building and running the examples included with eCos. All worked fine. Then, I started slowly porting some existing code to the new platform and ran into some issues. For the sake of narrowing down the problems, I went back to the eCos examples and created a new file, hello.cpp:  /* this is a simple hello world program */# include <iostream>  using namespace std;  int main(void) {  cout << "Hello, eCos world!" << endl;  return 0; }  The file compiles fine, but I get an error on the link:  nios2-elf-gcc -nostartfiles -L/cygdrive/c/altera/ecos/eqam_install/lib -Ttarget.ld -g -nostdlib -Wl,--gc-sections -Wl,-static -mhw-mul -mno-hw-mulx -mno-hw-div -o hello hello.o -lstdc++ /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../nios2-elf/lib/libstdc++.a(ios_init.o)(.text+0x31c): In function `std::ios_base::sync_with_stdio(bool)&#39;: /build/nios2/bin/nios2-gnutools/src/gcc/libstdc++-v3/libsupc++/new:92: undefined reference to `_impure_ptr&#39; /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../nios2-elf/lib/libstdc++.a(ios_init.o)(.text+0x31c):/build/nios2/bin/nios2-gnutools/src/gcc/libstdc++-v3/libsupc++/new:92: Unable to reach _impure_ptr (at 0x00000000) from the global pointer (at 0x04041e7c) because the offset (-67378812) is out of the allowed range, -32678 to 32767.  Any help that could be provided would be greatly appreciated.  Thanks! Rennie  P.S. For the sake of completeness, here&#39;s the compiler command and output:  nios2-elf-gcc -c -o hello.o -I/cygdrive/c/altera/ecos/eqam_install/include -g -O3 -ffunction-sections -fdata-sections -fno-rtti -fno-exceptions -fvtable-gc -DSYSTEM_BUS_WIDTH=32 -mhw-mul -mno-hw-mulx -mno-hw-div hello.cpp cc1plus: warning: switch "-fvtable-gc" is no longer supported

[Altera_Forum]

Hi all, 

 More information... I was able to get this far (errors regarding "impure pointer" during link) only after changing a setting in my setup using the eCos Configuration Tool. The setting I changed was under "ISO C Library", "ISO C Library internationalization functions". I enabled "Newlib&#39;s ctype implementation". Prior to that I was using the defaults, which did not have this option selected. Instead, it had "Inline versions of <ctype.h> functions" selected. But using this default selection, I had a different set of errors, this time during compilation. They were:  make INSTALL_DIR=/cygdrive/c/altera/ecos_library/eqam_install all  nios2-elf-gcc -c -o hello.o -I/cygdrive/c/altera/ecos_library/eqam_install/include -g -O3 -ffunction-sections -fdata-sections -fno-rtti -fno-exceptions -fvtable-gc -DSYSTEM_BUS_WIDTH=32 -mhw-mul -mno-hw-mulx -mno-hw-div hello.cpp cc1plus: warning: switch "-fvtable-gc" is no longer supported In file included from /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/bits/locale_facets.h:132,  from /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/bits/basic_ios.h:44,  from /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/ios:51,  from /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/ostream:45,  from /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/iostream:45,  from hello.cpp:2: /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:46: error: `_U&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:47: error: `_L&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:48: error: `_U&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:48: error: `_L&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:49: error: `_N&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:50: error: `_X&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:50: error: `_N&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:51: error: `_S&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:52: error: `_P&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:52: error: `_U&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:52: error: `_L&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:52: error: `_N&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:52: error: `_B&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:53: error: `_P&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:53: error: `_U&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:53: error: `_L&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:53: error: `_N&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:54: error: `_C&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:55: error: `_P&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:56: error: `_U&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:56: error: `_L&#39; was not declared in this scope /cygdrive/c/altera/kits/nios2_60/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../../include/c++/3.4.1/nios2-elf/bits/ctype_base.h:56: error: `_N&#39; was not declared in this scope make: *** [hello.o] Error 1  If anyone has a suggestion, I would really appreciate it.  Thanks, Rennie